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Anisotropies and non-Gaussianity of the Cosmological Gravitational Wave Background
/ Bartolo, N. (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua U. ; Padua Observ.) ; Bertacca, D. (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua U., Astron. Dept.) ; Matarrese, S. (U. Padua, Dept. Phys. Astron. ; GSSI, Aquila ; INFN, Padua ; Padua U.) ; Peloso, M. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Ricciardone, A. (INFN, Padua) ; Riotto, A. (CERN ; Geneva U., CAP) ; Tasinato, G. (Swansea U.)
The Stochastic Gravitational Wave Background (SGWB) is expected to be a key observable for Gravitational Wave (GW) interferometry. Its detection will open a new window on early universe cosmology and on the astrophysics of compact objects. [...]
arXiv:1908.00527.-
2019-12-04 - 7 p.
- Published in : Phys. Rev. D 100 (2019) 121501
Fulltext: PDF; Fulltext from Publisher: PDF;
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Stochastic gravitational wave background from stellar origin binary black holes in LISA
/ Babak, Stanislav (APC, Paris) ; Caprini, Chiara (Geneva U., Dept. Theor. Phys. ; CERN) ; Figueroa, Daniel G. (Valencia U., IFIC) ; Karnesis, Nikolaos (Aristotle U., Thessaloniki) ; Marcoccia, Paolo (Stavanger U.) ; Nardini, Germano (Stavanger U.) ; Pieroni, Mauro (CERN) ; Ricciardone, Angelo (Pisa U. ; Padua U.) ; Sesana, Alberto (Milan Bicocca U. ; INFN, Milan Bicocca ; Brera Observ.) ; Torrado, Jesús (Padua U. ; INFN, Padua)
We use the latest constraints on the population of stellar origin binary black holes (SOBBH) from LIGO/Virgo/KAGRA (LVK) observations, to estimate the stochastic gravitational wave background (SGWB) they generate in the frequency band of LISA. We account for the faint and distant binaries, which contribute the most to the SGWB, by extending the merger rate at high redshift assuming it tracks the star formation rate. [...]
arXiv:2304.06368.-
2023-08-14 - 39 p.
- Published in : JCAP 2308 (2023) 034
Fulltext: 2304.06368 - PDF; document - PDF;
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Gravitational waves from inflation in LISA: reconstruction pipeline and physics interpretation
/ LISA Cosmology Working Group Collaboration
Various scenarios of cosmic inflation enhance the amplitude of the stochastic gravitational wave background (SGWB) at frequencies detectable by the LISA detector. We develop tools for a template-based analysis of the SGWB and introduce a template databank to describe well-motivated signals from inflation, prototype their template-based searches, and forecast their reconstruction with LISA. [...]
arXiv:2407.04356; LISA-COSWG-24-03; CERN-TH-2024-072.-
2024-11-20 - 82 p.
- Published in : JCAP 2411 (2024) 032
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Probing non-Gaussian Stochastic Gravitational Wave Backgrounds with LISA
/ Bartolo, Nicola (Padua U. ; INFN, Padua ; Padua Observ.) ; Domcke, Valerie (DESY) ; Figueroa, Daniel G. (EPFL, Lausanne, LPPC) ; García-Bellido, Juan (CERN ; Madrid, IFT) ; Peloso, Marco (Padua U. ; Minnesota U.) ; Pieroni, Mauro (Madrid, IFT) ; Ricciardone, Angelo (Stavanger U.) ; Sakellariadou, Mairi (King's Coll. London) ; Sorbo, Lorenzo (Massachusetts U., Amherst) ; Tasinato, Gianmassimo (Swansea U.)
The stochastic gravitational wave background (SGWB) contains a wealth of information on astrophysical and cosmological processes. A major challenge of upcoming years will be to extract the information contained in this background and to disentangle the contributions of different sources. [...]
arXiv:1806.02819; UMN-TH/3720-18; CERN-TH-2018-130; IFT-UAM/CSIC-18-58; DESY 18-086; KCL-PH-TH/2018-22; ACFI-T18-08; UMN-TH-3720-18; IFT-UAM-CSIC-18-58; DESY-18-086; KCL-PH-TH-2018-22.-
2018-11-21 - 33 p.
- Published in : JCAP 11 (2018) 034
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Gravitational Wave Anisotropies from Primordial Black Holes
/ Bartolo, N. (INFN, Padua ; Padua U.) ; Bertacca, D. (INFN, Padua ; Padua U., Astron. Dept.) ; De Luca, V. (Geneva U., CAP) ; Franciolini, G. (Geneva U., CAP) ; Matarrese, S. (GSSI, Aquila ; INFN, Padua ; Padua U.) ; Peloso, M. (INFN, Padua ; U. Padua, Dept. Phys. Astron.) ; Ricciardone, A. (INFN, Padua ; Stavanger U.) ; Riotto, A. (CERN ; Geneva U., CAP) ; Tasinato, G. (Swansea U.)
An observable stochastic background of gravitational waves is generated whenever primordial black holes are created in the early universe thanks to a small-scale enhancement of the curvature perturbation. We calculate the anisotropies and non-Gaussianity of such stochastic gravitational waves background which receive two contributions, the first at formation time and the second due to propagation effects. [...]
arXiv:1909.12619.-
2020-02-26 - 21 p.
- Published in : JCAP 2002 (2020) 028
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Science with the space-based interferometer LISA. IV: Probing inflation with gravitational waves
/ Bartolo, Nicola (Padua U. ; INFN, Padua ; Padua Observ.) ; Caprini, Chiara (APC, Paris) ; Domcke, Valerie (APC, Paris) ; Figueroa, Daniel G. (CERN) ; Garcia-Bellido, Juan (Madrid, IFT) ; Guzzetti, Maria Chiara (Padua U. ; INFN, Padua) ; Liguori, Michele (Padua U. ; INFN, Padua ; Padua Observ.) ; Matarrese, Sabino (Padua U. ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Peloso, Marco (Minnesota U.) ; Petiteau, Antoine (APC, Paris) et al.
We investigate the potential for the LISA space-based interferometer to detect the stochastic gravitational wave background produced from different mechanisms during inflation. Focusing on well-motivated scenarios, we study the resulting contributions from particle production during inflation, inflationary spectator fields with varying speed of sound, effective field theories of inflation with specific patterns of symmetry breaking and models leading to the formation of primordial black holes. [...]
arXiv:1610.06481; ACFI-T16-19; UMN-TH-3608-16; CERN-TH-2016-222; KCL-PH-TH-2016-58; IFT-UAM-CSIC-16-104.-
2016-12-14 - 63 p.
- Published in : JCAP 12 (2016) 026
Fulltext: PDF; External link: Preprint
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Machine-Detector interface for multi-TeV Muon Collider
/ Bartosik, Nazar (INFN, Turin ; CERN) ; Calzolari, Daniele (CERN ; INFN, Padua ; Padua U.) ; Castelli, Luca (Rome U. ; INFN, Rome) ; Lechner, Anton (CERN) ; Lucchesi, Donatella (INFN, Padua ; CERN ; Padua U.)
/International Muon Collider Collaboration
One of the challenges of the multi-TeV muon collider is mitigating the effects of beam-induced background. The primary contribution to this background has been identified as decay products of the muon beams. [...]
2024 - 6 p.
- Published in : PoS EPS-HEP2023 (2024) 630
Fulltext: PDF;
In : 2023 European Physical Society Conference on High Energy Physics (EPS-HEP2023), Hamburg, Germany, 20 - 25 Aug 2023, pp.630
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Gravitational wave background from primordial black holes in globular clusters
/ Vanzan, Eleonora (Padua U. ; INFN, Padua) ; Libanore, Sarah (Padua U. ; Ben Gurion U. of Negev) ; Valbusa Dall'Armi, Lorenzo (Padua U. ; INFN, Padua) ; Bellomo, Nicola (Padua U. ; INFN, Padua ; U. Texas, Austin (main) ; Texas U.) ; Raccanelli, Alvise (Padua U. ; INFN, Padua ; Padua Observ. ; CERN)
Primordial black holes still represent a viable candidate for a significant fraction, if not for the totality, of dark matter. If these compact objects have masses of order tens of solar masses, their coalescence can be observed by current and future ground-based gravitational wave detectors. [...]
arXiv:2405.13871.-
2024-10-03 - 44 p.
Fulltext: document - PDF; 2405.13871 - PDF;
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Characterizing the Cosmological Gravitational Wave Background Anisotropies and non-Gaussianity
/ Bartolo, Nicola (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ.) ; Bertacca, Daniele (U. Padua, Dept. Phys. Astron. ; INFN, Padua) ; Matarrese, Sabino (U. Padua, Dept. Phys. Astron. ; INFN, Padua ; Padua Observ. ; GSSI, Aquila) ; Peloso, Marco (Padua U., Dept. Pure Appl. Math. ; INFN, Padua) ; Ricciardone, Angelo (INFN, Padua) ; Riotto, Antonio (Geneva U., CAP ; CERN ; Geneva U., Dept. Theor. Phys.) ; Tasinato, Gianmassimo (Swansea U.)
A future detection of the Stochastic Gravitational Wave Background (SGWB) with GW experiments is expected to open a new window on early universe cosmology and on the astrophysics of compact objects. In this paper we study SGWB anisotropies, that can offer new tools to discriminate between different sources of GWs. [...]
arXiv:1912.09433.-
2020-07-17 - 22 p.
- Published in : Phys. Rev. D 102 (2020) 023527
Fulltext: PDF;
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